I think a good way to start having a better understanding is to ask yourself if you'd prefer to be seen in society as a woman.
My life never made sense and when I figured it out it was as if this one piece of information tied it all up together.
When I found out I started paying attention to social situations when I'd just feel extremely awkward, uneasy, limited or out of my element, and then I'd imagine if I were a girl. Suddenly, those issues would simply be gone.
I always hated PE and now i realize that a big reason for that was that it was where gender separation and roles became extremely obvious, and it'd just make me feel anxious and bad to be seen, treated and being forced to do guys' stuff. I dreaded that class. After PE all I wanted to do was fix my hair, change and leave, then take a shower once I was home.
You should think of the social aspects, since you'll be dealing with those on a daily basis. From buying groceries to working. Can you see yourself living your entire life, the whole day, as a woman?

those might give you more to think about...sometimes you don't even know these things, but by asking yourself you might just find out

Regardless, this is how it was for me... there are more tomboyish trans, trans that knew since they were 4, there are various types. What we all have in common is that we're women

You're now with a therapist and he is definitely the one that will be able to help you get through that and find yourself. Welcome and enjoy the ride